Joomla! 1.7 has been available for quite a while now. Hagen Graf has written a new book to cover Joomla 1.7 and I realize I haven’t linked to it yet.
The book, which is written in English (with different translations available) covers all the aspects of building and maintaining your own Joomla! website. The PDF version is free for everyone to download. Unfortunately it’s not ad free, but that’s a small price to pay for a free book. Other versions are also available, but the price might vary.